Online ad auctions. In this first motivating example, the auctioneer – an advertising platform – is Sender, while the set of bidders – which are advertisers – is Receiver.We treat the bidders as a single Receiver since they all get the same signal; private signaling poses additional challenges [1]} and is left for future work.
The profile of the web user who is about to view the ad is the state of nature. This profile is known to the auctioneer, but not to the bidders; every signal reveals information about it. Such information revelation should be restricted by both privacy and fairness considerations.
